Snap-band for molds.



PATENTED AUG. 18, 1908.

W. HALES; SNAP BAND FOR oms. APPLICATION FILED APB. 20,1908.

IINVENTOR WITNESSES.

UNITED STATES PATENT OFFICE WILLIAM HALES, OF ST. LOUIS, MISSOURI,ASSIGNOR TO CHARTER OAK STOVE AND RANGE COMPANY, A CORPORATION OFMISSOURI.

SNAP-BAND FOR MOLDS.

Specification of Letters Patent.

Patented Aug. 18, 1908.

T 0 all whom it may concern:

Be it known that I, WILLIAM HALES, a citizen of the United States, andresident of St. Louis, Missouri, have invented certain new and usefulImprovements in Snap- Bands for Molds, of which the following is aspecification.

This invention relates to improvements in snap bands for molds, andconsists in the novel arrangement, construction and combination of partsas will be fully hereinafter described and claimed.

The object of my invention is to construct a band which is desi ned tofit over a sand mold, after the snap ask in which the mold has beenformed has been removed, preparatory to pouring the molten metal intothe mold.

A further object of my invention is to place my improved band over themold preparatory to the ouring of the molten metal into the mold orcompletely covering the joining edges of the mold preventing the leakageof metal which might by chance pass through the center joint locatedbetween both halves of the mold.

Figure 1 is a perspective view of a mold which has been formed in anordinary wooden snap flask. Fig. 2 is a pers ective view of the samewith the snap flas removed and the mold in its formed position. Fig. 3is a central sectional view of the mold with my invention in the act ofbeing applied thereon. Fig. 4 is a similar view to Fig. 3 showing myimproved band in position. Fig. 5 is a perspective view of my improvedsnap band.

In the construction of my invention, I provide a band made preferably ofa strip of sheet steel 6, bent at the point indicated by the numeral 7forming sharp corners; the one end 8 of the strip is securely fastenedto the opposite end by riveting the same together. The edges of thestrip of sheet metal are bent at right angles forming flanges 9 and 10,the said flanges being slit where the strip is bent forming the cornersand are turned inwardly forming the loops 11. The object of this is toavoid sharp edges so as to prevent cutting the hands of the personholding the same.

The object of the flanges 9 and 10 is to stiffen the band as well asacting for handles, and the corners 12 when bent are sufficientlyrounded so as to smooth the sides of the sand mold when the band isbeing placed over the mold, and as the said band is being placed inosition, the recess 13 which is generally formed by the result of theplacing of the upper and lower sections of the mold in position, isfilled with the surplus sand makm a complete joint as shown m Fig. 4when t he band is in its operative position. This will prevent themolten metal which is poured through the gate 14 from seeping throughthe joining edge 15 and contacting with the sides of the band.

Heretofore, wooden bands have been used and the inner surface of thebands have been burned by the molten metal which on occasions passedthrough the joining edge 15. The essential feature of my invention is todispense with this difliculty as well as to prevent the warping of suchbands by the varying temperature of the sand of which the molds areformed.

A band of this construction is more durable than the Wooden bands, morerigid, has a better binding quality, lighter, and more convenient tohandle.

Having fully described my invention, what I claim is:

1. A snap band for molds comprising a frame composed of walls formed ofa single strip of sheet material; the edges bent outwardly formingflanges; the corners of said ifliaiges bent inwardly substantially asspeci- 2. A device of the class described comprising a strip of sheetmaterial suitably bent forming a frame; the ends rigidly securedtogether; flanges formed by bending the edges of the sheet materialacting as stiffening members as well as handles; the corners of saidflanges being bent under; said device being adapted to be placed overthe sand mold to bindthe same while the molten metal is being pouredinto the mold, substantially as specified.

3. A snap band for molds comprising a frame of sheet material formed ofa single strip so arranged as to be placed over a mold after the copeand drag has been removed In testimony whereof, I have signed my fromthe mold for supporting the mold While name to this specificationyinpresence of two the molten metal is being poured therein,subscribingwitnesses.

flanges formed by bending the upper and WILLIAM HALES. 5 lower edges ofthe strip, the-corners'of said Witnesses:

flanges slit and bent under soas to avoid ALFRED A. EroKs,

" sharp edges, substantially as specified. I WAL 'I ER O. STEIN.

